Any of various natural earths containing ferric oxide, silica and alumina

Let's find possible answers to "Any of various natural earths containing ferric oxide, silica and alumina" crossword clue. First of all, we will look for a few extra hints for this entry: Any of various natural earths containing ferric oxide, silica and alumina. Finally, we will solve this crossword puzzle clue and get the correct word. We have 1 possible solution for this clue in our database.